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GB 3446-2026: Siamese connection
Status: Valid
GB 3446: Evolution and historical versions
| Std ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status |
| GB 3446-2026 | English | 259 |
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Siamese connection
| Valid |
| GB 3446-2013 | English | 209 |
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Siamese connection
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| GB 3446-1993 | English | 359 |
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Siamese connection
| Obsolete |
Standard similar to GB 3446-2026
GB 4351 | GB 7956.12 | GB 7956.1 | GB 4452 | GB 3445 | Basic data
| Standard ID | GB 3446-2026 (GB3446-2026) |
| Description (Translated English) | Siamese connection |
| Sector / Industry | National Standard |
| Classification of Chinese Standard | C84 |
| Classification of International Standard | 13.220.10 |
| Date of Issue | 2026-01-28 |
| Date of Implementation | 2027-02-01 |
| Older Standard (superseded by this standard) | GB 3446-2013 |
GB 3446-2026: Siamese connection
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 13.220.10
CCSC84
National Standards of the People's Republic of China
Replaces GB 3446-2013
Fire pump connection
Published on 2026-01-28
Implemented on February 1, 2027
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Table of contents
Preface III
1.Scope 1
2 Normative References 1
3.Terms and Definitions 1
4.Classification 1
4.1 Types and Specifications 1
4.2 Model Numbering 2
5.Technical Requirements 2
5.1 Structure 2
5.2 Materials 2
5.3 Appearance Quality 3
5.4 Thread 3
5.5 Connection Method 3
5.6 Handwheel 3
5.7 Opening Height 3
5.8 Sealing performance 3
5.9 Water pressure strength performance 3
5.10 Valves 3
5.11 Fire interface 4
6.Test Methods 4
6.1 Structural Inspection 4
6.2 Material Inspection 4
6.3 Appearance Quality Inspection 4
6.4 Thread Dimension Inspection 4
6.5 Handwheel Test 4
6.6 Start Height Test 4
6.7 Sealing performance test 5
6.8 Water pressure strength test 5
6.9 Safety valve opening pressure and differential pressure test 5
6.10 Fire protection interface performance inspection 5
7 Inspection Rules 5
7.1 Type Testing 5
7.2 Factory Inspection 6
8.Mark 7
9 Packaging 7
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents".
Drafting.
This document replaces GB 3446-2013 "Fire Pump Connection". Compared with GB 3446-2013, the main differences are structural adjustments and editorial changes.
In addition, the main technological changes are as follows.
a) The type and specifications of the fire pump connection have been changed (see 4.1,.2013 edition of 4.1);
b) The model designation for fire pump connections has been changed (see 4.2,.2013 version 4.2);
c) The structural requirements and test methods for fire pump connections have been changed (see 5.1 and 6.1,.2013 editions of 5.1 and 6.1);
d) The material requirements and test methods for fire pump connections have been changed (see 5.2 and 6.2,.2013 editions of 5.2 and 6.2);
e) The appearance quality requirements for fire pump connections have been changed (see 5.3,.2013 version 5.3);
f) The thread and flange size requirements and test methods for fire pump connections have been changed (see 5.4 and 6.4,.2013 edition of 5.4 and 6.4).
6.4);
g) Added requirements for the connection method of fire pump connections (see 5.5);
h) Added requirements and test methods for the handwheel of the fire pump connection (see 5.6 and 6.5);
i) The opening height requirements and test methods for fire pump connections have been added (see 5.7 and 6.6);
j) The sealing performance requirements and test methods for fire pump connections have been changed (see 5.8 and 6.7, and 5.5 and 6.5 in the.2013 edition);
k) The valve requirements for fire pump connections have been changed (see 5.10, 5.7 of the.2013 edition);
l) The requirements and test methods for fire pump connections have been changed (see 5.11 and 6.10, 5.8 and 6.8 in the.2013 edition);
m) The inspection rules have been changed (see Chapter 7, Chapter 7 of the.2013 edition).
Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.
This document was proposed and is under the jurisdiction of the State Fire and Rescue Administration.
The release history of this document and the document it replaces is as follows.
---First published in 1982 as GB 3446-1982, revised for the first time in.1993, and revised for the second time in.2013;
---This is the third revision.
Fire pump connection
1 Scope
This document defines the terminology for fire pump connections, specifies their classification, technical requirements, inspection rules, marking, and packaging, and describes the corresponding...
The experimental method.
This document applies to various fire pump connections in fire protection pipelines.
2 Normative references
The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.
For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.
This document.
GB/T 197 Tolerances for Standard Threads
GB/T 1176 Cast copper and copper alloys
GB/T 1348 Ductile Iron Castings
GB/T 1804-2000 General tolerances - Tolerances for linear and angular dimensions without specified tolerances
GB/T 4423 Copper and Copper Alloy Drawing Rods
GB 5135.11 Automatic sprinkler systems - Part 11.Grooved pipe fittings
GB/T 7307 55° Non-sealing pipe thread
GB/T 9124.1 Steel pipe flanges - Part 1.PN series
GB/T 9439 Gray Cast Iron Parts
GB 12514 (all parts) Fire Protection Connections
GB/T 17241.1 Cast iron pipe flanges - Part 1.PN series
JB/T 7273.3 Handwheel
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Fixed outside the building, used by fire trucks or motorized pumps to deliver fire-fighting water and other liquids to the building's fire water supply system.
Connecting devices for propellants.
Note. This document is referred to as the connector.
4.Classification
4.1 Types and Specifications
4.1.1 The installation types of the connectors are divided into above-ground type, underground type, wall type and multi-purpose type.
4.1.2 Multi-purpose connectors are divided into above-ground multi-purpose and underground multi-purpose types.
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